. Contributions to Canadian biology . Fig. 32. Shore of Burwash pond, showing Sphagnum-cassandra zone, with back-ground of black spruce. Habitat of Group Fig. 33. Pond on Split-rock Island, showing Sphagnum-cassandra zone. Habitatof Group lib, especially Leucorrhinia frigida and Nehalennia gracilis. Plate IX.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901